Rainer Wesche – författare

This text presents an overview of the known high-Tc superconductors and their physical properties, and emphasizes aspects related to conductor fabrication and high-current applications. An introduction to high-Tc superconductivity should be based on the fundamental physical principles of normal-state electrical conductivity and the well-known characteristics of conventional superconductors. In Chapter 2, this background is provided. Crystal structures, anisotropic properties and general trends of the critical temperatures of the cuprate superconductors are described in Chapters 3 and 4. The processing of superconductor powders addressed in Chapter 5 affects considerably the current-carrying capacity of high-Tc wires. In Chapter 6 several fabrication techniques for superconducting wires are described. In addition, the factors limiting the transport critical currents of high-Tc wires are discussed. The requirements for safe and stable operation of high-current superconductors are considered in Chapter 7, where the AC loss behaviour of high-Tc superconductors is discussed. Finally, an overview of potential magnet and power applications of high-Tc superconductors is given in Chapter 8.

A much-needed update on complex high-temperature superconductors, focusing on materials aspects; this timely book coincides with a recent major break-through of the discovery of iron-based superconductors.  It provides an overview of materials aspects of high-temperature superconductors, combining introductory aspects, description of new physics, material aspects, and a description of the material properties   This title is suitable for researchers in materials science, physics and engineering. Also for technicians interested in the applications of superconductors, e.g. as biomagnets

The discovery by J. G. Bednorz and K. A. Mtllier in 1986 that the superconducting state can exist in oxides at temperatures above 30 K stimulated research in the field of superconductivity and opened up a new field of research. Within a few years a large number of cuprate superconductors with transition temperatures well above the boiling point of liquid nitrogen have been found. The possibility of using liquid nitrogen as coolant re-stimulated interest in power applications of supercon­ ductivity. In this book an overview of the known high-Te superconductors and their physical properties is presented. Aspects related to conductor fabrication and high-current applications are emphasised. The material should be suitable for use in graduate­ level courses on superconductivity. Researchers in the field may profit from the large number of tables and references describing its status at the end of 1997. An introduction to high-To superconductivity must be based on the fundamental physical principles of normal-state electrical conductivity and the well-known characteristics of conventional superconductors. In Chapter 2 this background is provided. Crystal structures, anisotropic properties and general trends of the critical temperatures of the cuprate superconductors are described in Chapters 3 and 4. The processing of superconductor powders addressed in Chapter 5 affects considerably the current-carrying capacity of high-T. wires. In Chapter 6 several fabrication techniques for superconducting wires are described. In addition, the factors limiting the transport critical currents ofhigh-Te wires are discussed.

This book describes the status of research and development in the field of high-temperature superconductivity reached in the mid of the twenty-twenties. Starting from the milestones in the history of superconductivity, the main characteristics of the superconducting state are presented. Special physical properties of high-temperature superconductors are highlighted. Main classes of superconducting materials are introduced with the focus on high-temperature superconductors (cuprates and iron-based superconductors) and MgB2. Besides the material properties relevant for applications, the deposition of superconductor films and the manufacture of high-temperature superconductor wires are described. An outlook toward the future is included, covering potential applications of high-temperature superconductors in magnet technology and the electric power system.